Selection of Extruder Screw Material

1. Extruder screw

The extruder screw is the key component of the extruder. The performance of the screw determines the productivity, plasticizing quality, dispersion of additives, melt temperature and power consumption of an extruder and can directly affect its scope of application and production efficiency. Through the rotation of the screw, the plastic can be squeezed, and the plastic can move, pressurize, and obtain some heat from friction in the barrel. The plastic is mixed and plasticized in the process of moving in the barrel. As there are many types of plastics, their properties are also different. Therefore, in order to adapt to different plastic processing needs, the extrusion screw types and structures required are both different in actual operation,so as to maximize the efficiency of plastic transportation, extrusion, mixing and plasticization.

2. Extruder Screw Material Selection

The material of the extruder screw elements must have the characteristics of high temperature resistance, wear resistance, corrosion resistance and high strength, and should also have those of good cutting performance, small residual stress after heat treatment, and small thermal deformation.

3. Extruder Screw Material Requirements

(1) High mechanical properties. Extruder barrel material and extruder screw material must have sufficient strength to adapt to high-temperature and high-pressure working conditions and increase the service life.

(2) Good mechanical processing performance. This type of extruder screw material must have better cutting performance and heat treatment performance.

(3) Excellent corrosion and abrasion resistance.

  • Reasons and Countermeasures for Common Damage of Extruder Screw and Barrel

    Reasons and Countermeasures for Common Damage of Extruder Screw and Barrel

    June 8, 2021The screw and barrel of the extruder are the core components of the extruder. Their combination is related to the working quality of the extruder, the plasticizing ability of the material and the prod...view
  • The Reasons for the Unstable Extruder Screw Speed

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    August 25, 2021Ⅰ. Common causes of unstable working speed of extruder screw1. The driving V-belt is severely worn, causing slipping during work.2. The center distance of the V-belt drive pulley is too small, so tha...view
  • Heating and Cooling of the Extruder Screw Barrel

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    June 8, 20211. Heating method of the screw and barrel of extruderThe heating of the machine adopts the way of resistance heating, and thermocouples are used for segmented temperature control and side detection. R...view
  • Maintenance of Extruder Screw

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    April 27, 2022Ⅰ. Selection and installation of extruder screw1. The extruder screw should be made of alloy steel with wear resistance and small deformation when working in a high temperature environment. After fin...view
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